yup when i shift fast and kinda hard, doesnt matter what gear, i hear a squeeling like a belt kinda squelling??? and as soon as it finished shifting its gone. only here it for a second.
gonna call the dealer tomorrow and ask them and also check to see if i had the recalls were done on it also

K HERES ME AND I THINK AT LIKE 1MIN U CAN HERE ME SHIFT THE IT MAKE THE NOISE

YouTube - 09 COBALT SS TC vs 01 MUSTANG GT

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i hear a lil noice on mine if i do it quick, im assuming it has something to do with the LSD. i could be wrong thou

 

Shouldn't be the LSD when the car's between shifts (not under load).

 

it happens when i lift of the clutch i hear it

 

mine does it if i dont nls perfect

 

How long does it last?

NM reread original post. You sure it's not chirping the tires?

 

Wasn't this the BPV? Thought i read that some where on here IDK..

 

im doing it in(all gears) fifth gear. lol if im chirp'en in 5th i gots mad powere lol but yeah its on their for a sec or so not long. and when i have attempted to do the nls it did the same thing but i f'ed it up already lol(only tried 2x nls)

i hear the bpv open just fine then, when i let off the clutch i hear the squeel squeel.

 

That might make sense. Drivetrain isn't going to make a chirp/squeal sound, it's going to be more of a low-pitched grinding noise. Only culprits I could think of would be actual belt squeal (which would occur at other times as well), or something boost related.

 

With my K&N SRI its amplified sounds like a turkey.. lol

 

I can imagine. We messed with a friend's tune, left boost management stock in first gear, set second gear boost to zero. Good, healthy pull, then it just fell on its face.

If you've ever seen Toy Story 2, it sounded like Wheezy with his broken squeaker.

 

I assume it is the BPV opening.

 

its a belt slipping.. lots of threads on this.. some have had luck using different belts.. others just ignore it.

/thread

 

yeah idk if its at belt. i have 07 ls and mine does it too but i also have a transmission problem. luckly covered and soon fixed..

 

It's belt slip, I ignored it I'm not sure if it does anymore I haven't nls for long time

 

I have this exact same problem only during no lift shift. You would think a belt would make noise more often.

 

Do you guys have gm stage 1? I never had this happen until I got that.

 

im compleatly stock. i it does sound like a belt so is their any way to fix it???? u said get a New belt???

 

mine did it untill i hit about 14k then it stopped.. i beat on my car pretty bad till i tuned it

 

HMM..we have a belt tensioner that takes up slack automatically...be surprised if it's belt slipping.
Could be the clutch itself, since he says he hears it on lifting off the clutch, which is engagement.

 

Stock and mine does this if I NLS too low in the RPM band. Pretty sure it has to do with the way the BPV is opening.

 

it's like a wild pig man, it's so pissed off it squeals that's how much oink power this baby has.

 

Definitely sounds like a blown motor.

 

mine squeels thru first and second and a lil squeel into 3rd

 

Mine squeals every time I mash the gas. oh wait are we talking about cars?